Most angiosperms have alternate phyllotaxy. What allows each leaf to get the maximum exposure to light and reduces shading of lower leaves?
A) a leaf area index above 8
B) self-pruning
C) one leaf only per node
D) leaf emergence at an angle of 137.5°F from the site of previous leaves
E) a leaf area index above 8 and leaf emergence at an angle of 137.5°F from the site of previous leaves
Answer: D) leaf emergence at an angle of 137.5°F from the site of previous leaves
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Which of the following is/are true of the sheath of Leptothrix?
A. May contain ferric and manganic oxides B. Helps protect against microbial predators C. Attaches bacteria to surfaces D. All of the choices are correct.
The first generation of replication in the Meselson and Stahl experiment disproved which theory of replication?
A. Semiconservative B. Conservative C. Dispersive D. None—it took more than one generation to disprove the theory
Nasopharyngeal swab is:
a. acceptable. b. not acceptable.
What role does the plant cell wall compound lignin play in the adaptation of plants to a land environment?
What will be an ideal response?